Chemical Communication between the Endophytic Fungus Paraconiothyrium Variabile and the Phytopathogen Fusarium oxysporum

被引:60
|
作者
Combes, Audrey [1 ]
Ndoye, Idrissa [1 ]
Bance, Caroline [1 ]
Bruzaud, Jerome [1 ]
Djediat, Chakib
Dupont, Joelle [2 ]
Nay, Bastien [1 ]
Prado, Soizic [1 ]
机构
[1] Museum Natl Hist Nat, MCAM, MNHN CNRS, UMR 7245, F-75231 Paris, France
[2] Museum Natl Hist Nat, OSEB, MNHN CNRS, UMR 7205, F-75231 Paris, France
来源
PLOS ONE | 2012年 / 7卷 / 10期
关键词
MASS-SPECTROMETRY; BIOSYNTHESIS; OXYLIPINS; TETRALONE; WOOD;
D O I
10.1371/journal.pone.0047313
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Paraconiothyrium variabile, one of the specific endophytic fungi isolated from the host plant Cephalotaxus harringtonia, possesses the faculty to inhibit the growth of common phytopathogens, thus suggesting a role in its host protection. A strong antagonism between the endophyte P. variabile and Fusarium oxysporum was observed and studied using optic and electronic microscopies. A disorganization of the mycelium of F. oxysporum was thus noticed. Interestingly, the biological effect of the main secondary metabolites isolated from P. variabile against F. oxysporum did not account for this strong antagonism. However, a metabolomic approach of pure fungal strains and confrontation zones using the data analysis tool XCMS were analyzed and pointed out a competition-induced metabolite production by the endophyte in the presence of the phytopathogen. Subsequent MS/MS fragmentations permitted to identify one of the induced metabolites as 13-oxo-9,11-octadecadienoic acid and highlighted a negative modulation of the biosynthesis of beauvericin, one of the most potent mycotoxin of F. oxysporum, during the competition with the endophyte.
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页数:11
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